Washing machine provided with planetary drive means



WASHING MACHINE PROVIDED WITH PLANETARY DRIVE MEANS Filed July 21, 1949 Feb. 10, 1953 D. A. JOHNSON 6 Sheets-Sheet 1 Feb. 1-0, 1953 D. A. JQHNSON 2,627,741

WASHING MACHINE PROVIDED WITH PLANETARY DRIVE MEANS Filed July 21, 1949 6 Sheets-Sheet 2 Feb. 10, 1953 D. A. JOHNSON WASHING MACHINE PROVIDED WITH PLANETARY DRIVE "MEANS Filed July 21, 1949 6 Sheets-Sheet 3 fig. 3

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' WASHING MACHINE PROVIDED WITH PLANETARY DRIVE MEANS Filed July 21, 1949 6 Sheets-Sheet 4 Feb. 10, 1953 D. A. JOHNSON WASHING MACHINE PROVIDED WITH PLANETARY DRIVE MEANS Filed July 21, 1949 6 Sheets-Sheet 5 M 3 w w Z w n 6 4 a a I 2 z 6 f z w 6 9 1 #0 m 9---: mi u. I s HIM WW. 7: I 5Q. H f, U 7 M ww 7 a a w a Feb. 10, 1953 D. A. JOHNSON WASHING MACHINE PROVIDED WITH PLANETARY DRIVE MEANS Filed July 21, 1949 6 Sheets-Sheet 6 r 3 7 j Q 3 a s a u u V 6 4 h 6 9 7 ll j o 7 /0 a w a 4/ 7 4 fir I 2/ a M W 6 f 5 3 4 w J 6 M Q 7 M FT /z 9 I 111:1 J U J 1 e/v 9/0" l 7 I. 2Q, a m v 4 v N w W a an a a 157F311 Tar 24w 4 (/OA/MS'O/V by #4 Z {W H2725 Patented Feb. 16, 1953 VVASHIN G DIACHINE PROVIDED WITH PLANETARY DRIVE MEANS David A. Johnson, St. Joseph, Mich., assignor to Whirlpool Corporation, a corporation of New York Application July 21, 1949, Serial No. 105,949

3 Claims.

This invention relates to improvements in washing machines and more particularly relates to a simplified and improved form of automatic combination washing and extracting machine in which the washing cycle is followed by a spinning cycle, to extract liquid from the clothes.

A principal object of my invention is to provide a new and improved combination washing and extracting machine of more rugged and simpler construction than is found in the present machines of this type.

A more specific object of my invention is to provide a novel and simplified form of drive for oscillating the agitator or dasher of a washing machine, and for spinning the container for the clothes, to extract liquid therefrom, including a single rotatably driven shaft with coaxial drive connections therefrom to effect spinning of the clothes container or oscillation of the agitator.

A more specific object of my invention is to provide a novel form of combination washing and extracting machine having a simplified form of drive connection from a single vertical shaft, to effect the oscillating and spinning operations of the machine, the drive gearing of which is contained in a single housing connected to the clothes container and is so constructed and arranged as to eliminate all sliding gears and jaw clutches, and to utilize a single oppositely acting clutch and brake operable to effect the washing or extracting operations while the drive motor for the machine continues to rotate in one direction.

A still further object of my invention is to provide an improved washing machine having a simplified form of planetary geared reduction drive contained in a housing secured to a container for the clothes, to effect the oscillating operation during washing, the reaction member of which planetary geared reduction drive is formed by said housing, which housing is so constructed and arranged as to form a means for spinning the clothes container.

These and other objects of my invention will appear from time to time as the following specification proceeds and with reference to the accompanying drawings wherein:

Figure l is a transverse sectional view taken through the casing for the clothes container of a Washing machine constructed in accordance with my invention, with certain parts of the clothes container broken away and shown in vertical section;

Figure 2 is an enlarged fragmentary transverse sectional view taken through the clothes container and housing for the oscillating drive mechanism for the machine;

Figure 3 is a sectional view taken substantially along line IIIIII of Figure 1; and illustrating certain details of the drive for the machine and the vibration dampener for the clothes container;

Figure 4 is a fragmentary horizontal sectional view taken substantially along line IV--IV of Figure 1;

Figure 5 is an enlarged detail transverse sec tional view showing certain details of the support and mounting for the drive shaft of the machine and of the clutch and brake for connecting the parts of the machine in oscillating or rotating relation, with the clutch disengaged and the brake engaged, to effect the washing operation;

Figure 6 is a view somewhat similar to Figure 5 but showing the clutch engaged and the brake disengaged to eflect the extracting operation;

Figure '7 is an enlarged detail fragmentary horizontal sectional view taken substantially along line VII--VII of Figure 5; and

Figure 8 is an enlarged detail end view'showing the solenoid for controlling operation of the clutch and brake and for connecting the pump for removing liquid from the casing, in operative relation with respect to the drive shaft for the machine.

In Figure 1 of the drawings the machine is shown as including generally a cabinet l0 having a clothes container ll therein, with an agitator or oscillating dasher I2 mounted within said clothes container, for effecting the washing operation while said clothes container is held from oscillating movement.

The clothes container II is herein shown as being mounted on the upper end of a vertical drive shaft l3 having a ball-shaped lower end l4, encased in a resilient socket l5, preferably made from rubber. Said socket is mounted in the inner race of a ball bearing l6, mounted in a bearing support l1 mounted on and extending upwardly from a bottom I8 of a lower support or housing portion I9 of said casing; Said shaft extends upwardly from'said bearing and is supported intermediate its ends in a vibration dampening support indicated generally by reference character 20, as will hereinafter more clearly appear as this specification proceeds. Said shaft also extends upwardly within a housing 2| secured to and depending-from the bottom of the clothes container ll. Said housing forms the reactionmember for planetary geared reduction mechanism 22, contained therein and adapted to oscillatively drive the agitator or dasher l2 invention. A

through a vertical shaft 23 forming a continuation of the vertical shaft 63 and supported on the upper end thereof on a ball 25. The upper end of said shaft 23 has the agitator 12 mounted thereon and is of an irregular formation to oscillatively drive said agitator upon oscillation of said shaft. A hand screw 26 is provided to secure said agitator to said shaft.

The cabinet is has an upper inwardly extending annular top portion 2'! having a collar 28 extending downwardly from the inner margins thereof within an inwardly extending annular flanged portion 29 of the clothes container H, to form a means of access to said clothes container and to prevent the splashing or throwing of liquid from said container through the top of said casing. Said annular top portion of said casing is closed by a cover 30. Said casing also has an intermediate bottom 3!, at the top of the lower support portion 19 thereof. Said intermediate bottom is herein shown as being of an annular formation with a liquid retaining collar 3.3 extending upwardly fromthe inner margins thereof and encircling the shaft 13 and housing 21. Said annular bottom 3| leads to asump 34 having a flexible pipe or conduit 35 leading downwardly therefrom and connected to the suction end of a pump 35. Said pump .is herein shown as being a well known form of centrifugal pump and is not herein shown nor described in 1 detail, since it forms no part of my present similar flexible conduit (not shown) leads from a pressure outlet 37 of said pump to a drain, to discharge the liquid extracted from the clothes to waste. Said outlet may also be connected to a suitable storage tank for storing the liquid, if desired.

Liquid is supplied to the clothes container i2, by valves 38 and a flexible pipe 39 connected to a discharge pipe 4!! securedto the bottom of the annular top portion 21 of the casing It by a hanger ll and exten'dingdownwardly therefrom into the space between theinwardly extending flanged portion of the clothes container 2 l and the collar 28.

The pump 35 is herein shown as having a drive wheel 32 secured to the end of its shaft (not shown). Said wheel has a friction rim 63 engageable with the top surface of a drive pulley :5 on the vertical shaft [3. is secured to said vertical. shaft 15 asby a set screw 56. Said pulley is rotatably driven by a motor 63 by meansof a v belt 48. Said motor is herein shown as being pivotally mounted on a hanger 29 mounted on and extending inwardly from a side wall 50 of the'lower support portion 19 of the casing H3. A suitable means of a well known form maybe provided (not shown) to urge said motor in a direction away from the pulley 65, to maintain tension on the belt 58. When the friction rim 43 rests on the top surface of said drive pulley 45, the pump 36 will be driven from the motor 4'1 in an obvious manner.

A solenoid 5| is providedto control the washing and spinning operations of the machine and also to raise the friction rim -43 out of driving engagement with the pulley 45 during the washing operation. Said solenoid may be energized through suitable automatic timing mechanism in a manner well known to those skille'din the art-and no part of my presentinvention so not herein shown or described.

As shown in Figures "5, 6 and 8, the pump 3% is pivotally suspended from ears .52, filextending outwardly from a depending portion 553 :of a' Said drive pulley bracket 54, by means of pivotal pins 52a, 52a, extending through said ears and through cars 55, 55 extending upwardly from the housing of said pump. Said solenoid is also pivotally suspended from said bracket, to one side of said depending portion 53, for movement about an axis perpendicular to the axis of pivotal movement of said pump. Said bracket encircles a flanged sleeve 56 and rests on the upper side of the flange thereof. Said sleeve encircles the drive shaft l3 and is suitably mounted in the vibration dampening mechanism 20. Said bracket depends from the flanged portion of said sleeve and also forms a support for a shifting yoke 5? for a friction clutch 58 and a brake 5Q, operable to control oscillation of the dasher 12 or spinning of the clothes container H, as will hereinafter more clearly appear as this specification proceeds.

A plunger or core 6%! of the solenoid 5| is ivotally connected at its lower end to a pair of toggle links 5! and 62, as by a pivotal pin 53 (see Figure 8). Said toggle link 6| is pivoted at its end opposite said pin 63, to an arm 64 depending from the bracket 54, as by a pivotal pin 65. The other of said toggle links is pivotally connected to the lower end of one lever arm 55 of a bell crank 61. Said bell crank is pivoted intermediate its ends to the depending portion 53 of the bracket .54 by a pivotal pin 8%. The other lever arm .of said bell crank has a pin is extending inwardly therefrom and extending through a slot H formed in said depending portion 53 of said bracket and ex tending vertically therealong. Said pin has engagement with a projecting end '53 of the shifting yoke 57, for 7 pivotally moving said yoke upwardly about its point ,of connection to a depending bolt I l, forming asupport for the .end of saidshifting -yoketremote from said pin.

Said bolt is mounted on .and depends from the bracket .54. A compression spring liencircles said bolt and is interposed between the top of said shifting collar and the underside of said bracket, to yieldably hold said shifting yoke into engagement with the head of said bolt. A rod 76 is transversely pivoted adjacent its lower end to a strap Ti, encircling the housing for the shaft of said pump, and extends vertically therefrom through the end of said shifting yoke adjacent the pin 10. Said rod is slidably mounted adjacent its upper end in the bracket 5 A pin 13 extends through said rod, intermediate its ends, and is adapted to be engaged by a depressed portion 79 of the shifting collar 5?, upon vertical movement thereof. This will lift said rod and pump about the pins 52a,-52a against a compression spring 89 encircling said rod and interposed between the bottom of the bracket 54 and said pin. A-compression spring 8! likewise encirclessaid rod and is interposed between the underside of said shifting collar and a nut and washer 82 threaded thereon to urge and yieldably hold said friction rim 53 in engagement with the upper face of said pulley 55 when said shifting collar is in the depressed position shownin Figure 6. It should here be noted with reference to Figure 6 that the nut and washer 82 may preload the compression spring 2-! to enable the force of said spring to be added to the weight of saidpump to yieldably engage'said friction rim 43 with the upper face of pulley 45 when the shifting .collar 5'! is in a depressed position and that clearance is provided between the pin -18 and the shifting collar 51 when said shifting collar is in this position to assure that the full force of said spring and weight of said pump is taken on the upper face of said pulley 65 through said friction rim.

The vibration dampener 23 is of a form somewhat similar to that shown and described in application, Serial No. 78%,109 filed November 5, 1947, now Patent No. 2,554,573, and is no part of my present invention, so it only need herein be pointed out that it includes generally two crossing tie plates 85, 83, herein shown as extending diagonally across the casing I3 and as having the flanged sleeve 58 extending therethrough and suitably supported thereby. The free ends of said tie plates rest on and are movably secured to brackets 8?, 81 extending inwardly from the corners of said casing, I8 by means of nuts and bolts 88, 88. Said arms have bearing engagement with friction plates (not shown), and clearance is provided between said bolts and the apertured portions of said arms through which said bolts extend, to allow for limited movement of said arms with respect to said brackets in all directions. Tension springs 39, 89 are connected between said arms and I connecting members 93, 90, extending inwardly from the inside of the side walls H, 5!) of the support portion I9 of the casing It to yieldably restrain movement of said arms with respect to said brackets.

The clothes container II is herein shown as being circular in horizontal cross-section with an upright outwardly flaring side wall having liquid expelling apertures 93 adjacent the upper end thereof and having an upper cap portion 95 forming a continuation of said side wall and having the inwardly extending flan ed portion 29 extending inwardly from the upper end thereof. Said upper cap portion 9d likewise has a plurality of liquid expelling apertures 95 opening therefrom beneath the flanged portion 29 thereof.

The bottom of the clothes container II is apertured at its center and is supported on a shouldered portion 96 of an upright hollow post 9'! formed integrally with and extending upwardly from a cover 98 for the gear housing 2i (see Figure 2). A nut 39 threaded on said post is provided to secure said container to said post. Suitable packing may be interposed between said nut and the bottom of said clothes container, to prevent liquid from leaking from the bottom of said tub. An annular recessed or dish-shaped plate IE9 is secured to the underside of the bottom of said clothes container as by machine screws IIiI having nuts threaded thereon. Said machine screws may be recessed in said bottom and spot welded and soldered thereto, to prevent the leakage of liquid thereby, or suitable leakproof packing may be interposed between said annular plate and bottom to provide a leakproof joint therebetween. Said dish-shaped plate is secured at its lower inner portion to the top of the top cover 98 of the housing 2|, as by cap screws I05, I securing said top cover to said housing.

The housing 2! has a depending hollow boss I35 mounted on the upper end of a sleeve Ili'I. Said sleeve may be suitably secured to said boss as by keys or splines (not shown) to rotate said Figures 5 and 6). Said sleeve is journalled at its lower end in a ball bearing IIB mounted in a recessed portion III of a drive member II2 for the friction clutch 58. Said drive member is herein shown as being connected to the shaft I3 for rotation therewith, by means of a set screw I I4. A bearing i I 5 herein shown as being a well known form of sleeve bearing is mounted in the upper end of said sleeve I01 and forms a bearing for the upper portion of the shaft I3 (see Figure 2).

The dasher shaft 23 is journaled in the cover 38 for the housing 2I andin the center post 91, on bearings H3 and H1, respectively and has a hub H9 of a pinion I2ll secured thereto and depending therefrom. Said pinion I2!) is herein shown as extending downwardly over the upper end of the drive shaft I3 and as being journaled thereon as by a bearing I2I.

The oscillating drive from the shaft i3 to the aligned dasher shaft 23 includes gear teeth out in the upper portion of said shaft I3 and forming a sun pinion I23 of the planetary gear reduction mechanism 22. Said sun pinion meshes with and drives a planetary gear I25 journaled on the upper end of a spindle I27 mounted in a boss I28 formed integrally with the bottom of the housing 2|, and extending upwardly therefrom. A nut I39 threaded on the lower end of said spindle, is provided to secure said spindle to said housing. Said planetary gear I25 meshes with an internal gear I3 I, herein shown as being formed integrally with a depending flanged portion I32 of a casing I33 encircling the shaft I 3 and journaled thereon on a bearing I3 2. The casing I33 has an upstanding eccentric I35 formed integrally therewith and having an eccentric strap journaled thereon on a bearing I31. Said eccentric strap is herein shown as being split at one of itssides and as having two lugs I33, I39 extending outwardly from each side of the split portion thereof, through which extends a machine screw led, which may be threaded in one of said lugs (see Figure 4). Said eccentric strap I36 has a portion MI extending therefrom in one direction and having a spindle I42 secured thereto and projecting upwardly therefrom, and journaled at its upper end in a boss I43, herein shown as being formed integrally with a gear sector use. Said gear sector is journaled on the upper end of a spindle I45, mounted in and extending upwardly from a boss M6, herein shown as being formed integrally with the housing 21. A nut Ml, threaded on a lower end of said spindle I 55 is provided to secure said spindle to said boss. The gear sector I 34 meshes with the teeth of the pinion I23 to oscillate said pinion upon rotation of the shaft I3 and internal gear I3I upon holding the housing 2! from rotation.

The brake 53 is provided to hold the housing 2i from rotation when it is desired to oscillate the agitator or dashe-r I2, said housing then serving as the reaction member of the planetary geared reduction device 22 (see Figures 5 and 6). Said brake, as herein shown, includes an annular plate I54 held from rotation and extending around a hub I55 of a driven member I55 of the friction clutch 58. Said annular plate has cars 55?, I51 extending upwardly from opposite sides thereof and transversely pivoted adjacent their upper ends to the shifting yoke.51, by pivotal pins I59, I59. The top surface of said plate is adapted to engage the bottom of an annular friction disk I60 secured to the bottom of an annular plate I6 I, splined on the hub of the driven memher I55 of the friction clutch ,58. .The driven member I56 of saidfrictionclutch is splined on a sleeve I63 for slidable movement therealong. The upper portion of said sleeve is herein shown as having a flange I64, and said sleeve is secured to the sleeve It? by means of a set screw I65 threaded ,in the flange I65 and engaging the sleeve I62. An annular bearing plate IE6 is secured to the top surface of the flanged sleeve I63 and engages the bottom of the flange of the flanged sleeve 58. Compression springs I69, I59 are interposed between the underside of the flange I63 and the top of the plate lei to urge said plate towards said annular plate I54 and to yield upon application of the brake.

It is obvious from the foregoing that when the yokefifi is pivoted upwardly about its supporting connection on the depending bolt 'I i upon energizing the solenoid 5I that the annular plate I55 will move upwardly into engagement with the friction disk 168. Said annular plate 554 being held from rotation by the yoke 5? will hold said friction disk I66 from rotation. This will also hold the flanged sleeve I53, sleeve I01 and housingii from rotation. Said housing 2! will then serve asthe reaction member for the planetary reduction gearing 2a, to efiect oscillation of the dasher I2 through said planetary reduction gearing, eccentric strap I35 and gear sector Hi4 meshing with the pinioniZii. At this time the clutch yoke 52 comes into engagement with t .e pin iii on the rod I6, and lifts the friction rim is of the wheel ii out of engagement with the top surface of. the pulley #45, to stop operation of the pump 36.

When the solenoid 5| has been deenergized and the clutch yoke 57 is in the depressed position shown in Figure 6, a friction disk I?! on the bottom of the driven member I56 of the friction clutch 58 will come into engagement with the driving member H2 of said clutch. fect rotation of said driven member and the sleeve iBLrotatably driven bythe sleeve I63 and set screw I65. It will also effect rotation of the housing 2| secured to said sleeve, and the clothes container II .to spin said clothes container and extract liquid therefrom and from the clothes therein through the liquid discharge apertures $3, 93 and 95, 95. At the same time the friction rim 43.01: the wheel 4| will come into engagement with the top surface of the drive pulley 45, to

drive the pump 36 and discharge liquid from the sump 34 to waste, or tea suitable storage tank (not shown) where it is desired to store and reuse the liquid extracted from the clothes.

It may be seen from the foregoing that a novel formof combination washing and extracting machine of the automatic type has been provided having a far simpler drive than formerly, which enables oscillation of the dasher or spinning of the clothes containerto be effected with a minimum number of'gears and with no shifting of gears, and utilizes a simple form of friction clutch and bra-lee connected to operate oppositely of each other, so that when the shifting means therefor is in one position the clutch is engaged to effect spinning of the clothes container, and when in another position the clutch is disengaged and the brake is engaged to effect oscillation of the dasher.

It may further be seen that this simplified form of drive to oscillate the dasher or spin the clothes container is obtained by a simple planetary geared reduction drive, the reaction member of which is formed by ahousing therefor,secured to the bottom-of the clothes container and held This will effrom rotation bya brake, to effect oscillationof the 'dasheraand that upon. release of the brake, a clutch will be engaged, to rotate said housing and reaction member and spin the clothes container. It is also apparent that during the initiation of the spinning operation, the initial rotation of the reaction member of the planetary will slow down the oscillating motion of the dasher until the sleeve I01 andsaid reaction member andhousing rotate at the speed of the shaft I3, at which time said planetary gear reduction mechanism and dasher will rotate as a unit with the reaction member and clothes container.

.It may still further beseen that the drive shaft for the planetary may be continuously driven during the washing and extracting operations and that this shaft extends within the housing or reaction member forthe planetary geared reduction mechanismand has the oscillating dasher shaft supported thereon for relative movement with respect thereto and extending upwardly therefrom, and oscillatively driven from said drive shaft through gearing contained wholly within saidhousing and effecting oscillation of the dasher merely byholding said housing from rotation.

While I haveherein shown and described one form in which my, invention may be embodied, it will be understood that various modifications and variations thereof may be effected without departing from the spirit and scope of the novel concepts thereof.

I claim as my invention:

1. Driving mechanism adapted for a combined washing and extracting machine having a cabinet having a clothes container journaled therein for rotation about a vertical axis and having an oscillating dasher therein, comprising a housing secured to and depending from said clothes container, a rotating drive shaft extending upwardly through the bottom of said housing and having a pinion thereon, a motor, means driven by said motor for driving said shaft, oscillating drive shaft aligned with said first drive shaft and having said dasher supported thereon, bearing means between the adjacent ends of said shafts supporting one shaft on the other, a sleeve encircling said rotating drive shaft and secured to said housing, mechanical ,means for rotating said sleeve from said shaft to rotate said housing and said clothes container for extraction, brake means for holding said sleeve and housing from rotation, and means reacting against said housing when held from rotation to oscillatably drive said oscillating shaft and dasher for washing. comprising a pinion on said oscillating shaft extending downwardly within said housing and encircling said rotating drive shaft and disposed above said pinion on said rotating drive shaft. a casing rotatably journaled on said rotating drive shaft between said pinions, planetary gearing foiarotatably driving said casing comprising an internal gear on said casing, a planetary gear journaled within'said housing and meshing with said internal gear, and driven by saidpinion on said rotating drive shaft, and oscillating drive mechanism connected between said easing and said pinion on said oscillating drive shaft for oscillatably driving said pinion and the dashcr thereon, upon the holding of said housing from rotation.

2. Drive mechanism adapted for a combined washing and extracting machine having a cabinet, a clothes container mounted therein for rotation about a vertical axis and having an oscillating dasher therein, comprising a housing secured to and depending from said clothes container, a rotating drive shaft extending upwardly through the bottom of said housing and having a pinion thereon, a motor, means driven by said motor for continuously driving said rotating drive shaft, an oscillating drive shaft aligned with said first drive shaft and extending upwardly therefrom within said clothes container and having said dasher supported thereon, thrust bearing means between said shafts rotatably supporting one shaft on the other, a sleeve encircling said rotating drive shaft and secured to said housing, clutch means for rotatably driving said sleeve from said rotating drive shaft to rotate said housing and spin said clothes container for extraction, brake means for holding said sleeve and housing from rotation, and means for oscillatably driving said oscillating drive shaft and dasher from said rotating driv shaft upon application of said brake means, comprising a pinion on said oscillating drive shaft extending downwardly within said housing and encircling said rotating drive shaft and spaced above said pinion on said rotating drive shaft, a casing rotatably journaled on said rotating drive shaft between said pinions, planetary gearing for rotatably driving said casing from said pinion on said rotating drive shaft when said housing is held from rotation comprising a planetary gear journaled within said housing, an internal gear on said casing meshing with and driven from said planetary gear, an eccentric on said casing and an oscillating drive connection between said eccentric and said pinion on said oscillating drive shaft. for oscillatably driving said pinion, shaft and dasher upon the holding of said housing from rotation.

3. In a driving mechanism adapted for a combined washing and extracting machine having a cabinet, a clothes container journaled in said cabinet for rotation about a vertical axis and having an oscillating dasher therein, the improvements comprising a housing secured to and depending from said clothes container, a vertical rotating drive shaft extending upwardly through driving said shaft, an oscillating drive shaft forming a continuation of said first drive shaft, a thrust bearing between said shafts and supporting one shaft on the other, said oscillating drive shaft having said dasher mounted thereon, a sleeve encircling said rotating drive shaft and secured to said housing, a clutch selectively operable to rotatably drive said sleeve from said rotating drive shaft to rotate said housing and said clothes container for extraction, a brake for holding said sleeve and housing from rotation, and means driven by said rotating drive shaft for oscillatably driving said oscillating drive shaft upon the application of said brake comprising a pinion on said oscillating drive shaft and encircling said rotating drive shaft and journaled thereon, a casing rotatably journaled on said rotating drive shaft between said pinions, and planetary gearing rotatably driving said casing from said rotating drive shaft comprising said pinion on said rotating drive shaft, a planetary gear rotatably supported within said housing and driven by said pinion, an internal gear within said casing and meshing with said planetary gear and rotatably driving said casing upon the holding of said housing from rotation, a rocking gear segment journaled within said housing and meshing with said pinion on said oscillating drive shaft, an eccentric on said casing, and an eccentric strap connecting said eccentric with said rocking gear segment for oscillatably driving said gear segment and dasher upon rotation of'said casing and the holding of said housing from rotation.

DAVID A. JOHNSON.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,876,210 De Vries Sept. 6, 1932 1,911,630 Lenning May 30, 1933 2,119,918 Kirby June 7, 1938 2,135,084 Kirby Nov. 1, 1938 2,301,046 Henderson Nov. 3, 1942 2,302,012 Dyer Nov. 17, 1942 2,461,078 Page Feb. 8, 1949 

